That fact is from the speeches of Ken Dychtwald, America's foremost expert on the age bubble (baby boomers) and its effect on financial planning. He last mentioned it about three weeks ago on Wall Street Week on PBS.
You can see more about this at www.agewave.com
I am with Northwestern Mutual and he presented to us at our 2003 Annual Meeting. It was very informative in guiding us towards the changes coming in our practices.
I have no idea who this Dychtwald guy is, but I have visited old cemeteries and have seen the dates of births and deaths. Go see for yourself.